In the early hours of May 3, 2026, a fire broke out in a four-storey residential building in Vivek Vihar, East Delhi. Nine people lost their lives – including a toddler.
Iron grilles on windows blocked escape. Locked terrace gates left residents with nowhere to go.
By the time fire tenders arrived, the blaze had consumed at least six flats across three floors.
Investigations point to a suspected AC blast or electrical short circuit as the trigger.
And the hard truth is – electrical fires like this one happen because the systems designed to prevent them were either missing, poorly installed, or never tested.
If you are a building contractor, MEP consultant, electrical maintenance head, building owner, or even a homeowner, this is specially written for you.
What Actually Causes Electrical Fires in Buildings and Industries?
Most people imagine electrical fires start dramatically – a visible spark, a loud blast, an obvious warning sign. In reality, they begin quietly, often over months or years, before anyone notices.
Here are the most common starting points:
- Faulty or ageing wiring, where insulation breaks down over time
- Overloaded circuits and distribution panels are unable to handle the increasing power demand
- Leakage currents with no safe path to dissipate
- Degraded or non-existent earthing systems that allow voltage to build up on equipment and structures
Together – especially at 3 am when a building is asleep – they can be deadly.
But each of these, on its own, is manageable.
The Role of Poor Earthing in Electrical Accidents
An earthing system is designed to give fault current a safe path into the ground. When it is absent, undersized, or poorly maintained, fault current has nowhere to go. It builds up. It generates heat. It finds a path through materials that were never designed to carry it – cables, insulation, walls.
That is how an electrical fault becomes a fire.
How Small Electrical Faults Become Major Fire Hazards
Think of it this way: a single hairline crack in a water pipe seems minor. Left unchecked, it causes structural damage. Electrical faults work the same way. A minor leakage current ignored over time leads to insulation failure, which ultimately leads to fire.
The difference between a minor fault and a disaster is often one thing – whether there is a properly working earthing system in place.
Why a Properly Designed Earthing System Is Your First Line of Defence
A well-designed earthing system does more than meet regulatory requirements. It actively works to keep your building and its occupants safe – every second of every day, invisibly.
What a Good Earthing System Does for Your Building
- Provides a low-resistance path for fault current to safely reach the ground
- Prevents dangerous voltage buildup on metal equipment, panels, and structures
- Protects sensitive electrical and electronic equipment from damage
- Reduces the risk of electric shock to occupants
- Minimises fire risk from arcing and overheating
These are not theoretical benefits. Every one of these functions kicks in during a real fault event – the kind that happens without warning at any hour.
IS 3043:2018 – The Standard Most Projects Get Wrong
India’s Bureau of Indian Standards has published IS 3043:2018, which provides detailed guidelines for designing, installing, and maintaining earthing systems. These standards cover soil resistivity testing, electrode selection, conductor sizing, bonding requirements, and more.
Most projects reference this standard in their documentation. Far fewer actually implement it correctly on site.
The gap between what is written in a project report and what gets installed in the ground is where most electrical safety failures begin.
Common Earthing Mistakes in Construction and Industrial Projects
After working across multiple buildings and industrial installations, we see the same mistakes repeated across projects of all sizes.
Mistake 1 – Treating Earthing as a Last-Minute Checklist Item
Earthing is often installed in the final days of a project, as a box to tick before handover. By this point, decisions about trench locations, electrode types, and conductor routing have already been made – and made wrong.
Earthing design needs to happen during the electrical design phase, not after the building is already up.
Mistake 2 – Using Substandard Electrodes and Backfill Materials
Cost pressure on projects leads contractors to substitute standard-compliant materials with cheaper alternatives. Low-quality copper electrodes corrode faster. Poor backfill compounds fail to maintain the low soil resistivity needed for effective grounding.
What looks like a cost saving at the project stage becomes a safety liability within 2–3 years of installation.
Mistake 3 – Ignoring Soil Resistivity in System Design
Soil resistivity varies significantly across locations – rocky terrain, sandy soil, and clay-rich ground all behave differently. An earthing system designed without a soil resistivity test means you are only guessing that earthing will work fine, but it does not, in most cases.
A system that performs well in one location may completely fail in another if designed without soil testing.
Mistake 4 – No Testing or Maintenance After Installation
Earthing systems are not an install-and-forget infrastructure. Soil conditions change with the seasons. Connections corrode. Electrodes degrade. Without periodic earth resistance testing and maintenance audits, even a well-designed system can fail silently over time.
Most building owners and facility managers have never had their earthing system tested after the original installation.
Electrical Safety Is a Design Decision – Not an Afterthought
The Vivek Vihar fire – like most electrical fire incidents – did not happen because of one single catastrophic failure. It happened because of a series of small decisions made earlier: in design, in material selection, in construction shortcuts, and in the absence of any maintenance protocol.
What MEP Consultants and Contractors Must Do Differently
- Design earthing systems based on actual soil resistivity data, not generic assumptions
- Specify IS 3043-compliant materials in procurement documents and enforce them on site
- Include earthing system testing as a formal handover requirement
- Plan for maintenance access so earth pits can be inspected and tested after construction
- Integrate safety into design briefs from Day 1, not as an add-on at the end
What Building Owners and Homeowners Should Ask Before Signing Off
You do not need to be an electrical engineer to ask the right questions:
- Has the earthing system been tested after installation?
- What earth resistance value was achieved?
- When was the last maintenance audit done?
- Are the earthing materials IS 3043-compliant?
- Is there documentation of the earthing design?
If your contractor or facility manager cannot answer these questions with confidence, that is your warning sign.
How INTER TECH Designs Earthing Systems Built to Last
At INTER TECH, we approach every earthing installation as an engineering project, not a compliance exercise.
Our Methodology
Step 1 – Soil Resistivity Testing
Before recommending any system, we test the soil at your project site. Soil conditions directly determine electrode type, depth, and spacing.
Step 2 – Application-Specific Design
We design earthing systems based on your building type, electrical load, and site conditions – whether it is a residential apartment block, a commercial complex, a data centre, or an industrial facility.
Step 3 – High-Performance Materials
We use advanced earthing electrodes and use Marconite Earthing backfill compounds engineered for long service life – even in high-resistivity or corrosive soil conditions.
Step 4 – Installation and Testing
Our installations are followed by earth resistance testing with documented results – so you have proof that the system works, not just a certificate saying it was installed.
Step 5 – Periodic Maintenance Support
We offer scheduled testing and audit services to keep your earthing system performing as designed, year after year.
Who We Work With
- MEP consultants and electrical designers
- Building construction contractors
- Industrial plant and facility managers
- Electrical maintenance heads
- Architects and project management consultants
- Building owners – residential, commercial, and industrial
- Homeowners upgrading or auditing their electrical systems
Get Your Earthing System Audited – Before It’s Too Late
The bad news: The Delhi fire tragedy is a painful reminder that electrical safety failures have human consequences.
The good news: most electrical fires are preventable. The right earthing system, designed correctly and maintained properly, stops faults from becoming fires.
If you are currently planning a new building project, managing an existing facility, or simply unsure whether your home’s earthing system is working, now is the right time to find out.
Don’t assume your earthing is working. Know that it is.
